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Application filed by Compeq Mfg Co LtdfiledCriticalCompeq Mfg Co Ltd
Priority to MYPI91002118ApriorityCriticalpatent/MY107469A/en
Publication of MY107469ApublicationCriticalpatent/MY107469A/en
A PROCESS FOR RECOVERING TIN FROM A WASTE LIQUID CONTAINING RECOVERED TIN INCLUDING THE STEPS OF (A) REDUCING AN OXIDIZER IN THE WASTE LIQUID BY ADDING A REDUCER, OR BY HEATING THE WASTE LIQUID, (B) PRECIPITATING OUT METAL IONS OTHER THAN THOSE OF TIN AND FILTRATING THE RESULTED LIQUID INTO FILTRATE AND PRECIPITATES, (C) REMOVING FLUORINE IONS FROM THE FILTRATE BY ADDING A LIQUID CONTAINING ALUMINIUM, IONS, (D) REPLACING THE TIN IONS CONTAINED IN THE FILTRATE AND FILTRATING THE RESULTANT SOLUTION INTO FILTRATE AND TIN POWDER OR GRANULES, (E) REFINING THE OBTAINED TIN POWDER OR GRANULESS BY SMELTING.
MYPI91002118A1991-11-151991-11-15Process for recovering tin from a waste liquid containing tin recovered from printed circuit boards
MY107469A
(en)
Method of recovering metals,in particular copper,from effluents and/or used solutions containing stable complexes of those metals and originating in particular during printed circuit manufactureing processes